热水和冷冻系统上变速泵的控制必须基于水系统的水力分析。该水力分析使控制装置制造商能够选择并编程变速和泵加减控制装置，以实现最大的系统（线到水）效率。通过要求控制器制造商提供变速驱动装置来确保机组的责任。这些泵的控制是通过使用差压变送器和持续询问来实现的。 这就消除了系统振荡、泵速的持续变化和泵的低效运行。关键词:变速电机、泵、水泵、控制装置、效率、热水供应、冷冻水供应、优化。引文:研讨会，ASHRAE交易，第97卷，Pt。1991年，纽约

The control of variable-speed pumps on hot- and chilled systems must be based upon a hydraulic analysis of the water system. This hydraulic analysis enables the control manufacturer to select and program the variable-speed and pump addition and subtraction controls to achieve the maximum system (wire-to-water) efficiency. Unit responsibility is secured by requiring the control manufacturer to furnish the variable-speed drives. Control of these pumps is achieved through the use of differential pressure transmitters and continuous interrogation of them. This eliminates system hunting, continuous variation in pump speed, and inefficient pump operation.KEYWORDS: variable speed motors, pumps, water pumps, controls, efficiency, hot water supply, chilled water supply, optimisation.